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If $A=P(\{1,2\})$ where $P$ denotes the power set, then which one of the following is correct?
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The correct answer is:
$\{1,2\} \in A$
$A=P(\{1,2\})=\{\phi,\{1\},\{2\},\{1,2\}\}$
(\because: Power set is the collection of all subsets of the set A) From above it is clear that $\{1,2\} \in \mathrm{A}$
(\because: Power set is the collection of all subsets of the set A) From above it is clear that $\{1,2\} \in \mathrm{A}$
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